1. Amsden, T. W., 1955: Lithofacies map of Lower Silurian deposits in central and eastern United States and Canada. Bull. Am. Assoc. Petrol. Geologists 39, 60–74.
2. Andel, Tj. H. van, 1950: Provenance, transport and deposition of Rhine sediments. Wageningen: Veeman & Sons. 129 p.
3. Andel, Tj. H. van 1959: Reflections on the interpretation of heavy mineral analyses. J. Sediment. Petrol. 2, 153–162.
4. Andel, Tj. H. van 1960: Sources and dispersion of Holocene sediments, northern Gulf of Mexico in Recent sediments, northwest Gulf of Mexico. Tulsa: Am. Assoc. Petrol. Geologists, p.34–55.
5. Andresen, M. J., 1961: Geology and petrology of the Trivoli sandstone of the Illinois basin. Illinois Geol. Survey, Cir. 316, 31 p.